Sperm-specific glyceraldehyde 3-phosphate dehydrogenase (GAPDS) originates from spermatogenic cells of the human testis. A strong staining of GAPDS was detected in epididymal epithelium, especially in principal cells and basal cells of the epithelium. GAPDS also bound to the fibrous sheet of the sperm tail and inhibited the motility and penetration ability of sperms. The rat model showed that at postnatal day 28 the spermatogenic cells began to express GAPDS protein. By day 60 its expression decreased in spermatogenic cells while it increased in Sertoli cells. After sexual maturation (120 days) GAPDS protein was expressed in both Sertoli cells and elongated sperms. The expression of GAPDS gradually increased with age in the epididymis.

Keywords:
Glyceraldehyde 3-phosphate dehydrogenase, Testis, Epididymis, Sperm
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2013
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